Jack



June 12, 1928.

H. CARLSON JACK Filed Dec. 10, 1928 (if gave/mic? GAELSO/V.

2 t C 0 2 III? .M. o l 4 d 1 8 H M 3 z o 7.. 0, 1 6 O I & l n 1] 2 32 0 00 H T. RN

Patented June 12, 1928.

UNITED STATES PATENT OFFICE- CAELSON, 0], DULUTH, MINNESOTA.

JACK.

Application vfiled December 10, 1926. Serial No. 153,864.

that may be conveniently folded for transportation.

Still other objects and advantages of the invention will appear in the further description thereof.

Referring now to the accompanying drawing, forming part of this application, wherein like reference characters indicate like parts:

Figure l is .a semi-scctional .view showing the centermost jacking elements elevation;

Figure 2 is a top plan view of the com pletely assembled jack or frog, except that the uppern'iost covering plate of the jacking members is removed;" a

Figure 3 is a combined enlargedsection and elevation taken on the line 3'3 Figure 1, also having the covering plate removed; and

Figure 4. is an enlarged perspective view of the innermost end of oneof the body portions of the jack.

.The body portion of the jack comprises the two flat metal members 1 and 2, separably united as at 3, so .as to permit of being knocked down for transportation purposes when desired. These "members are each pro vided, longitudinally of their centermost portions, with spaced Z-bars 4 securely attached thereto, forming channels as is obvious in which the spaced rollers 5 may reciprocate in their travel longitudinally of the upper faces of the members 1 and 2. These rollers carry upon their supporting shafts, those on the member 1, the arcuately shaped jacking member 6, and those ,onjthe member 2, the similar arcuately shaped member 7; those supporting the member 6 being spaced somewhat farther apart than those supporting the member 7, for reasons which will subsequently appear. These two members 6 and 7 are pivotally united upon the shaft 8 so that as their lower ends, supported on the rollers as previously described, are drawn toward each other. .or separated, the pivotal connection .8 inay function. I prefer to have the ends of the members 6 and 7, adjacentthe pivotal conneetion 8 each provided with an arcuately shaped protrudingprong 0, so thatwhen the supporting ends of these members are drawn more closely together, asindicatedin clotted lines in Figure 1, said prongs will provide a varyingsaddle i when the device is being used as a common jack, the object of which is obvious. To the sides of the lower wi member 6 are mounted two spaced upright bracket-like members ,9, intermediate of which is mounted upon the sliaft 10 the small drum ll having formed integral therewith at one end the ratchet wheel 12. mally cngageable with this ratchet wheel 12 is the pawl 13' held in such engagement by a suitable spring 14, and; the handle 1501 the pawl is widened considerably to provide convenient engagement by the operators foot when it desired to release the jack by disengaging the pawl from the ratchet wheel. l

The shaft 10 protrudes beyond the bracket 9 on one sideof the member 6 and carries thereupon a common ratchet wrench, indicated at 16, by the depression of whichthe shaft 10 rotated intermittently in a clockwise direction as viewed from the opposite end. About the druinll is wound a line 17.

which passes over the drum, downwardly of the inner side thereof and beneath the small sheave 18, carried by the member ,6, and thence suitably attached as at 19 adjacent the rollers 5, which support the lower end of the member 7. This line is forthe purpose of drawing the lowermost supporting ends of the members 6 and? togetherwhen the shaft and drum are rotated, and it is evident that the line will function as holding means for the lower ends of the members in any desired spaced position .as long as the pawl 13 properly engages the ratchet wheel 12, and that by pressing downwardly on the handle end of the pawl 13 it .wi-llbe disengaged from the ratchet 12 and @LllOfW.

the lower ends of the members 6 and Ito separate, thus lowering their pivotal connection 8.

As auxiliary supporting means for the jack I provide a pair of members similar in shape, size and connection to the members dened end'lof the Nor,-

or seat for the object supported, for example, the axle of a car,

6 and 7 upon either side thereof, and spaced bers therefrom,- as clearly indicatedin Figures 2 and 3 of the drawings, these members being illustrated at 20. The shaft 8, it will be noted, which forms the pivotal connection to'the members 6 and 7, extends later ally from both sides thereof and also forms the pivotal connection for the pairsof the members 20, and the lower ends of these members simply drag back and forth upon the upper faces of the members 1 and 2 to help support the members 6 and 7 Flanges 21 are provided upon the membersl and 2 externally of the pairs of members 20 to act'asguide's therefor, and outboard of one i of these flanges I .haveshown an extension 22 of the edges ofthe members 1 and 2 to provide a step for thesupporting member 23.

whichfas indicated at 24;, is piovidedwith a head strap br yoke for convenientengage-j mentwithh the hubof a wheel that is to be run up onto the frog'so that the member 23, being of the proper length, will drag itself along on the extension 22 of the jack, and when the wheel is fully raisedon the members 6 and 7, the'member 23 will be substantially vertical under the axle. When the frogis depressed or'collapsed this member 23 will act as a support for the axle of the car, or, as is obvious, any other form of support in the form of blocks or the like may be putunder the wheel or axle of the car before the frog is collapsed; and, all that is necessary to accomplish the latter is to press downwardly on the handle 15 of thedog 13after removal of the ratchet wrench 16, when the frog may be entirely removed if desired. At the supporting end of the jacking. members 7 I provide a small toe board 27 pivotally mounted upon the axle of the rollers 5 in any desired manner to lessen the abruptness of the approach 'for a wheel mounting the jack} and also for the purpose of preventing the jacking i. members from being vslid to the extreme operating end of their supporting members, as might occur from the 'mounting 'of the car upon the jack, as the toe board overlaps the extreme outer end of the member 2.

The pivotal connection of the members 1 and 2, which is indicated at 3 in Figure 1, is preferably accomplished by the slightly bent prongs 28 carried by and protruding over the end of the member 1 for holding engagement with suitable eyes indicated at29 exof so that when the outermost ends'of the members 1and2 are raised they may be conveniently hooked or unhooked, and yetwhen thus united the ends prevented from being forced downwardly and their abutting edges I humped as might occur whenthe jackis used upon soft ground.

The'covering plate for the jacking mempreviously referred to is illustrated at 25, it having suitable openings indicated at 26 through which the extreme ends 0 of the members 6-and 7 v may protrude when the latter are abnormally elevated, as indicated indotted lines, Figure 1. This covering plate is preferably of metal and securely riveted to both the members 6 and 7 and both pairs of similar members 20 so that it be comes a rigid portion of the jacking element and may further be covered by cushion-i ing means such as rubber or the like, not shown, for convenience" in the mounting of the automobile wheel. j q

"Having thus described my invention, what I'claim and desire to secure by Letters *Patlying prone upon and cooperatively connected with said body portion, the remote ends of said members being slidable upon their respective body ortions, and means carried upon the slidable end of one of the members and connected with the other whereby they may be pivotally operated.

2. A device of the character described comprising a body portion composed of two ground engagingsupporting members, separable cooperative'means upon the abutting l ends of said members for pivotally uniting same, pivotailly united members mounted upon the ground engaging members, one of sald pivotal members carrying operating 'means and slidable upon its supporting member. a

3. A device of the character described comprising two separable supporting memotal members being made slidable upon its I supporting member, a pawl controlled winding drum carried upon the slidable member,

a line operated bythe drum connecting the. 1

remote ends of the pivotal members for raising and lowering said members.

described 4. A device of the character comprising a two-part, foldable body portion,pivotally united membersnormally lying prone upon and cooperatively connected with said body portion, and means carried by one of the members and connected with each other whereby they may be pivotally operated.

5. A jack of the character described comprising two pivotally united members, operating means carried wholly' byone of. said members andconnected to the other member whereby they may be 'pivotally operated. v

In testimony whereof I afiix my signature.

YHJALMAR CARLSON. I 

